Improvement in door-hangers



1. COLLINS.

Donor-Hangers.

Patented April 2l, 1874.

Jag/Zin L TSI'NITED STATES PATENT OFFICE.

JOHN COLLINS, OF HOHOKUS TOWNSHIP, BERGEN COUNTY, NEW JERSEY, ASSIGNORTO HOPKINS AND DICKINSON MANUFACTURING COMPANY.

||v|PRovEMENT .IN Doon-HANGERS.

Specification forming part of Letters Patent No. 149,994, dated April21, 1874 application led March 21, 1874.

To all whom it may concern Be it known that I, JOHN COLLINS, of Hohokustownship, Bergen county, in the State of New Jersey, have invented a newanduseful Improvement in Sliding Door-Sheave and I do hereby declarethat the following is a full and exact description thereof, referencebeing had to the accompanying drawings and to the letters of referencemarked thereon.

Previous to my invention, all the sheaves with which I am familiar havebeen more or less impracticable, owing to certain defects inconstruction.

The objects and ends of my invention are to overcome all the variousobjections and provide a sheave simple and economic in construction, andperfectly practicable in operation 5 and to these ends and objects myinvention consists in a sheave for sliding doors, &c., constructed witha properly-grooved pulley or wheel, having trunnions, and mounted in aframe or housing, in which are formed casings for, and in which areplaced two sets of antifriction rolls or wheels, as will be hereinaftermore fully described.

To enable those skilled in the art to make and use my improved iixture,I will proceed to more fully to describe its construction and operation,referring by letters to the accompanying drawings, in which- Figure l isa side elevation; and Fig. 2, a vertical cross-section of the same.

A represents the cast-iron frame or housing, which is made in two parts,as shown, bolted together at b b, and which is adapted to be let intothe door in the usual manner. B is the wheel, the face of which isgrooved, or otherwise formed, to properly adapt it to the kind (orshape) of rail on which it is to travel. This wheel B is formed with twotrunnions or laterally-projecting axes, c c, around cach of which isarranged a series or set of anti-fric tion rolls or wheels, t' i, 85e.,about six in number, and about equal in diameter to the diame ter of theaxes c. These anti-friction wheels take their bearings in the dished-outportions d d of the frame A, the whole being so constructed and arrangedtogether that while the wheels i bear their peripheries against theinternal circumferences of these portions d of the frame, and alsoagainst each other, the

axles or trunnions c c are respectively held in suspension between each(surrounding) set of wheels fi, as clearly illustrated. By thisarrangement it follows that whenever the wheel B is rotated its axes c cwill revolve against the moving peripheries on the anti-friction wheelsi, which in turn will rotate about their axes, and at the same timetravel round within the dish-like receptacles d of the frame.

.As thus all the surfaces of contact are moving together, it followsthat very little friction or wear will occur, and that the fixture willwork with great ease.

In the sides of the housing A are formed openings at f, through whichthe workin g parts may be examined, and at which oil may be applied tolubricate the journals and wheels. I propose in the manufacture of myimproved xture to make the wheel B and housing` A of cast iron, asusual, and the anti-friction rolls fi of steel. A

It will be observed that in a fixture made according to my invention thediameters of the axes and anti-friction rolls can be proportioned asdesired, and can be made just as great as may be deemed best, withoutany enlargement of the hub of the wheel, since to increase the size ofthe parts named only necessitates an enlargement of the receptacles d lof the housing or frame A.

Having so fully described my improved fixture that any one skilled inthe art can make and use it, what I claim as new therein, and desire tosecure by Letters Patent, is

The combination, with a wheel, B, having trunnions or axes c c, of aframe or housing', A, formed with circular receptacles, d 1,-and twosets of anti-friction wheels, 'i i, the whole constructed and arrangedto operate substantially in the manner and for the purpose set forth.

In testimony whereof I have hereunto set my hand and seal this 11th dayof March, 1874.

JOHN COLLINS. [L

In presence of- HENRY R. WANMAKER, J oHN N. BLAKELEY.

